EXPERIMENTS ON LOWER HYBRID CURRENT DRIVE AND HEATING ON PETULA-B
The application of Lower Hybrid (LH) waves in Petula B has so far demonstrated the efficiency of ion heating, eta-i approximately equal to 4.10**13 eV.cm**-3/kW, at Zn-e = 6.10**13 cm**-3 in D-2 plasmas. At low density, most of the plasma current can be replaced and a current drive efficiency eta-CD = 1.5 10**13 kA.cm**-3/kW is achieved at n-e < 1.8 10**13 cm**-3 in D-2 plasmas with a zero loop voltage. The paper gives a review of recent physics studies. For ion heating, the dependence of the heating with the density and the plasma current is presented. The limitations of the ion heating at high density (D-2, n-e < 8.10**13 cm**-3) and the impurity pollution are discussed. For HF current drive discharges, the HF current drive efficiency, the behavior of the fast electron population supporting the HF current are examined. Then a few results of the MHD activity studies and the stabilization effect of the HF power, and finally a tentative global energy balance of these HF sustained discharges, are presented.
Bibliographic Reference: 1984 INTERNATIONAL CONFERENCE ON PLASMA PHYSICS, LAUSANNE (SWITZERLAND), JUNE 27-JULY 3, 1984 VOL. I, PP. 225-245 EUR 9708 EN (1985), FS, VOL. I AND VOL. II, 1155 P., BFR 3500 (BOTH VOLUMES), EUROFFICE, LUXEMBOURG, POB 1003
Record Number: 1989124055400 / Last updated on: 1987-01-01
Available languages: en